import os
from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search
from models.product import Product
from models.customer import Customer
from models.order import Order

cloud_id = os.getenv("ELASTICSEARCH_CLOUD_ID")
api_key = os.getenv("ELASTICSEARCH_API_KEY")

try:
    es = Elasticsearch(cloud_id=cloud_id, api_key=api_key)

except ConnectionError as e:
    print("Error:", e)


def search_elasticsearch(index, query):
    response = es.search(index=index, body={
        "query": {
            "multi_match": {
                "query": query,
                "fields": ["title", "description", "category", "tags"]
            }
        }
    })
    return response['hits']['hits']


def search_products_by_keywords(encoded_query):
    body_query = {
        "_source": ['Gender', 'Category', 'SubCategory', 'ProductType',
       'Colour', 'Usage', 'ProductTitle', 'ImageURL'],
        "knn": {
            "field": "ImageEmbedding",
            "query_vector": encoded_query,
            "k": 4,
            "num_candidates": 500
        }
    }

    response = es.search(index='fashion', body=body_query)
    return response['hits']['hits']


def search_products_by_filters(filters):
    response = es.search(index='fashion', body={
        "query": {
            "bool": {
                "filter": filters
            }
        }
    })
    return response['hits']['hits']


def get_product_details(product_id):
    response = es.get(index='fashion', id=product_id)
    return response['_source']


def index_product(product: Product):
    es.index(index="fashion", id=product.product_id, body=product.dict())


def index_customer(customer: Customer):
    es.index(index="customers", id=customer.customer_id, body=customer.dict())


def get_customer(customer_id: str):
    response = es.get(index="customers", id=customer_id)
    return response['_source']


def update_customer(customer_id: str, updates: dict):
    es.update(index="customers", id=customer_id, body={"doc": updates})


def index_order(order: Order):
    es.index(index="orders", id=order.order_id, body=order.dict())


def track_order(order_id: str):
    response = es.get(index="orders", id=order_id)
    return response['_source']


def get_order_details(order_id):
    s_order = Search(using=es, index='orders').query(
        'match', **{'Order ID': order_id})
    s_details = Search(using=es, index='order_details').query(
        'match', **{'Order ID': order_id})
    order_response = s_order.execute()
    details_response = s_details.execute()

    if order_response.hits.total.value > 0 and details_response.hits.total.value > 0:
        order = order_response.hits[0].to_dict()
        details = [detail.to_dict() for detail in details_response.hits]
        return {
            "order": order,
            "details": details
        }
    else:
        return "Order not found"


def add_to_cart(customer_id: str, product_id: str, quantity: int):
    cart = es.get(index="carts", id=customer_id)['_source']
    if 'items' not in cart:
        cart['items'] = []
    cart['items'].append({"product_id": product_id, "quantity": quantity})
    es.index(index="carts", id=customer_id, body=cart)
    return cart


def view_cart(customer_id: str):
    response = es.get(index="carts", id=customer_id)
    return response['_source']


def remove_from_cart(customer_id: str, product_id: str):
    cart = es.get(index="carts", id=customer_id)['_source']
    cart['items'] = [item for item in cart['items']
                     if item['product_id'] != product_id]
    es.index(index="carts", id=customer_id, body=cart)
    return cart


def checkout(customer_id: str):
    cart = es.get(index="carts", id=customer_id)['_source']
    order = {
        "customer_id": customer_id,
        "items": cart['items'],
        "status": "processing"
    }
    es.index(index="orders", body=order)
    es.delete(index="carts", id=customer_id)
    return order